Koda Formation

Koda Formation (Ueki and mitusio, 1998) Noda et al., 2017

Invalid synonym: Fukudahara Formation, Yamamoto Formation, Iruhi Formation, Komatsubara Formation

Type locality: Koda, Yamamoto town, Mitoyo city, Kagawa prefecture
Coherent formation
early Pleistocene, Calabrian
Contemporaneous heterotopic facies: Saita Formation, Yakeo Formation

Sedimentary facies: Fluvial
Lithofacies: Sands, Silt
Lithofacies (Minor): Gravels

Thickness: 60 m
Upper limit: Unconformity (Yakeo Formation, Takase Formation, Higher and Middle Terrace Deposits, , Lower Terrace Deposits)
Lower limit: Interfingered (Saita Formation), Unconformity (Shiroyama Formation, Hiketa Formation, Kan-onji Plutonic Rocks)

Mitoyo Group
[ Upper ]
--------------
Takase Formation
~~~~~~~~~~~~~~
Yakeo Formation
~~~~~~~~~~~~~~
Koda Formation
'''''''/,,,,,,
Saita Formation
~~~~~~~~~~~~~~
[ Lower ]

Sakaide lowland, Kagawa pref.
[ Upper ]
--------------
Ayagawa Formation
~~~~~~~~~~~~~~
Sakaide Formation
--------------
Honmachi Formation
--------------
Mitoyo Group
~~~~~~~~~~~~~~
[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Koda - Tsuji - Kochi - Saitanaka - Hagata - Samata, Mitoyo city, Kagawa pref.; Hagihara - Fukudahara, Kanonji city, Kagawa pref.
Fossils (Plants): Menyanthes sp., Metasequoia sp., Picea maximowiczii
Tephra: Koda 1, Sako, Otaniike, Nakakochi, Kamikochi

Noda et al. (2017) Geology of the Kan-onji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 96p. (in Japanese with English abstract 4p.)